The premise of the question is incorrect.
Only one of the Great Lakes does not contain part of the Canada-U.S. border. That is Lake Michigan.
Canada and the United States are the only two countries to border the five Great Lakes. They are situated on the border between the two nations, though some are further in one country than the other.
Only two countries border the Great Lakes, these are Canada and the USA.
Only two countries border the Great Lakes, these are Canada and the USA.
Canada and USA
U.S. and Canada
The Great Lakes are bordered by the United States and Canada. The two regions bordering the Great Lakes are the Central and Northeast.
Two. Ontario and Quebec.
The Great Lakes are bordered by the United States and Canada. The two regions bordering the Great Lakes are the Central and Northeast.
The Great Lakes lie between the United States of America and Canada.
The Northeast and North-Central regions border the Great Lakes.
The International Boundary between Canada and the US runs through four of the five Great Lakes: Superior, Huron, Erie and Ontario. The lakes themselves do not act as a border.
All five are between Canada and the U.S.